CN206250778U - A kind of photovoltaic inverting system - Google Patents

A kind of photovoltaic inverting system Download PDF

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Publication number
CN206250778U
CN206250778U CN201621186509.0U CN201621186509U CN206250778U CN 206250778 U CN206250778 U CN 206250778U CN 201621186509 U CN201621186509 U CN 201621186509U CN 206250778 U CN206250778 U CN 206250778U
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CN
China
Prior art keywords
inverting system
photovoltaic inverting
housing
photovoltaic
many
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Active
Application number
CN201621186509.0U
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Chinese (zh)
Inventor
赵为
梅晓东
张显立
陈威
申潭
李顺
陆游
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Sungrow Power Supply Co Ltd
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Sungrow Power Supply Co Ltd
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Priority to CN201621186509.0U priority Critical patent/CN206250778U/en
Priority to CA2965113A priority patent/CA2965113A1/en
Priority to US15/499,080 priority patent/US20180131193A1/en
Priority to EP17168658.7A priority patent/EP3319195A1/en
Application granted granted Critical
Publication of CN206250778U publication Critical patent/CN206250778U/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00019—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using optical means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H02J2300/26—The renewable source being solar energy of photovoltaic origin involving maximum power point tracking control for photovoltaic sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Inverter Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The utility model provides a kind of photovoltaic inverting system, and many therein independent inversion unit concentrated settings are in housing；Every independent inversion unit has independent MPPT functions, so that there is the photovoltaic inverting system multichannel MPPT to control, under the complex scenes such as massif, in face of partial occlusion and towards inconsistent phenomenon, can realize that the peak power of photovoltaic group string generates electricity, it is ensured that system generated energy.Simultaneously because independent inversion unit is put together in housing, facilitate in-site installation O＆M.

Description

A kind of photovoltaic inverting system
Technical field
The utility model is related to photovoltaic inversion technical field, more particularly to a kind of photovoltaic inverting system.
Background technology
Currently, the centralized inversion scheme in photovoltaic inverting system, referring to Fig. 1, including：Multi-channel DC collector-shoe gear, one Individual box inverter (or inverter room, container) and a box type transformer.
After the output of cell plate group string, direct current collector-shoe gear is accessed nearby, direct current collector-shoe gear passes through cabling by direct current group string Box inverter is aggregated into, the output end by box inverter is directly grid-connected by box type transformer.
But under the program, the MPPT of inversion system (Maximum Power Point Tracking, maximum power point with Track) control the size less, under the complex scenes such as massif, in face of partial occlusion and towards inconsistent phenomenon, cause generated energy to drop It is low.
Utility model content
The utility model provides a kind of photovoltaic inverting system, with solve the problems, such as in the prior art MPPT control the size it is few.
To achieve the above object, the technical scheme that the application is provided is as follows：
A kind of photovoltaic inverting system, including：Transformer, exchange collector-shoe gear, communication apparatus, many independent inversion units And multi-channel DC collector-shoe gear；Wherein：
The input of the multi-channel DC collector-shoe gear corresponds with multichannel photovoltaic group string be connected respectively；
Described many independent inversion unit concentrated settings are in housing；
The input of many independent inversion units is respectively with the output end of the multi-channel DC collector-shoe gear one by one Correspondence is connected；
The output end of many independent inversion units is connected with the input for exchanging collector-shoe gear；
The output end of the exchange collector-shoe gear is connected with the low-pressure side of the transformer；
One end of the communication apparatus is the communication terminal of the photovoltaic inverting system, inverse independent with described many of the other end The control end for becoming unit is connected.
Preferably, the housing is：Wrap up box-type shell, room or the container of many independent inversion units.
Preferably, the housing is integral type platform；The integral type platform includes：
It is provided with the base of many independent inversion units；
Or the base of many independent inversion units is provided with, and it is arranged at many independent inversion units The upper lid of top.
Preferably, the communication apparatus includes：Cell controller and interchanger；Wherein：
One end of the cell controller is connected with the control end of many independent inversion units；
The other end of the cell controller is connected with one end of the interchanger；
The other end of the interchanger is the communication terminal of the photovoltaic inverting system.
Preferably, many independent inversion units are：DC/AC converters.
Preferably, at least one inversion unit also includes in many independent inversion units：DC/DC converters；Institute The output end for stating DC/DC converters is connected with the input of the DC/AC converters.
Preferably, many independent inversion units are：Group string inverter.
Preferably, also include：The air channel being arranged in the housing and Smoke Sensor.
Preferably, the exchange collector-shoe gear may be contained within the housing with the communication apparatus.
Preferably, the communication terminal of the photovoltaic inverting system is connected by optical fiber with power station backstage.
The photovoltaic inverting system that the utility model is provided, many therein independent inversion unit concentrated settings are in shell In vivo；Every independent inversion unit has independent MPPT functions so that there is the photovoltaic inverting system multichannel MPPT to control System, under the complex scenes such as massif, in face of partial occlusion and towards inconsistent phenomenon, can realize the maximum work of photovoltaic group string Rate generates electricity, it is ensured that system generated energy.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the utility model embodiment or prior art, below will be to embodiment Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, below description in accompanying drawing only It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structure chart of the centralized photovoltaic inverting system that prior art is provided；
Fig. 2 is the structural representation of the photovoltaic inverting system that the utility model embodiment is provided；
Fig. 3 is the structure chart of the photovoltaic inverting system that another embodiment of the utility model is provided；
Fig. 4 is another structure chart of the photovoltaic inverting system that another embodiment of the utility model is provided；
Fig. 5 is the structure chart of the collecting and distributing type photovoltaic inverting system that prior art is provided；
Fig. 6 is the schematic layout pattern of the enclosure interior that another embodiment of the utility model is provided.
Specific embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this The specific embodiment of utility model is described in detail.
The utility model provides a kind of photovoltaic inverting system, with solve the problems, such as in the prior art MPPT control the size it is few.
Specifically, the photovoltaic inverting system, referring to Fig. 2, including：Transformer 101, exchange collector-shoe gear 102, communication set Standby 103, many independent inversion units 104 and multi-channel DC collector-shoe gear 105；Wherein：
The input of multi-channel DC collector-shoe gear 105 corresponds with multichannel photovoltaic group string be connected respectively；
Referring to Fig. 3, many independent concentrated settings of inversion unit 104 are in housing 100；
Many inputs of independent inversion unit 104 respectively with a pair of the output end 1 of multi-channel DC collector-shoe gear 105 Should be connected；
The many output ends of independent inversion unit 104 are connected with the input for exchanging collector-shoe gear 102；
The output end for exchanging collector-shoe gear 102 is connected with the low-pressure side of transformer 101；
One end of communication apparatus 103 is the communication terminal of the photovoltaic inverting system, the other end inversion list independent with many The control end of unit 104 is connected.
In specific practical application, communication apparatus 103 can be arranged near housing 100 in the form of communication counter, be handed over Stream collector-shoe gear 102 can also be arranged at the outside of housing 100, be not specifically limited herein, only a kind of example, in the application Protection domain in.
Specifically operation principle is：
The output of each photovoltaic group string is confluxed by respective direct current collector-shoe gear 105, then by two direct currents (+/-) It is transferred in housing 100.
The independent respective input of inversion unit 104 of DC interface, i.e., many externally is provided with housing 100, respectively Corresponded with the output end of direct current collector-shoe gear 105 and be connected；
Many independent inversion units 104 carry out inversion under respective MPPT controls respectively, are then confluxed by exchange Device 102 is confluxed, the low-pressure side of output to transformer 101 (such as box type transformer).
One end of communication apparatus 103 is the communication terminal of the photovoltaic inverting system, is connected with power station backstage.
In specific practical application, by taking 1MW systems as an example, a power for independent inversion unit 104 is 50KW, one Individual independent inversion unit 104 includes three MPPT, then the MPPT quantity that 1MW systems have is 20 × 3=60 MPPT, can be compared with Good applies in complex scenes such as massif power stations.
Therefore, the photovoltaic inverting system that the present embodiment is provided, with multichannel MPPT controls, in complex scenes such as massifs Under, in face of partial occlusion and towards inconsistent phenomenon, can realize that the peak power of each photovoltaic group string generates electricity, it is ensured that system Generated energy.
In addition, each independent unification of inversion unit 104 is placed on inside housing 100, carried out inside housing 100 pre- After dress, externally by DC interface, docked with direct current collector-shoe gear 105, not only total system is simple, can realized live quick Access；Meanwhile, the inner core equipment of housing 100 is concentrated and placed, convenient unified management O＆M；In specific application, independent is inverse It is 50Kg or so to become the weight of unit 104, quick-replaceable in the case of can accomplishing without professional.In compared to existing technology in addition The group string data inversion scheme of presence, each independent inversion unit are dispersed in the middle of the array of power station, particularly in massif power station, this Photovoltaic inverting system described in embodiment, O＆M promptness is greatly improved, and difficulty is greatly reduced.
What deserves to be explained is, also there is the collecting and distributing type inversion scheme shown in Fig. 5 in photovoltaic inverting system of the prior art, After the output of cell plate group string, DC/DC intelligent junction boxes are accessed nearby, DC/DC intelligent junction boxes are converged direct current group string by cabling Box inverter is always arrived, the output end by box inverter is directly grid-connected by box type transformer.Although DC/DC intelligent junction boxes With MPPT functions, but because DC/DC intelligent junction boxes are connected by transmission line very long with the box inverter in rear end, and The high-frequency direct-current voltage of DC/DC intelligent junction boxes output, after long-time is transmitted, there is larger electricity parasitic over the ground in transmission line Hold, cause system to there is larger high-frequency leakage current, and then reduce system effectiveness and reliability, substantial amounts of DC/ occurs in scene The situation that DC intelligent junction boxes are damaged.Meanwhile, there is no rapid coordination mechanism between DC/DC header boxs and box inverter, only Coordinate the work of system by connection, the response speed of system does not catch up with, easily break down, such as AC network low-voltage When passing through, DC/DC header boxs cause the rapid lifting causing trouble of DC bus-bar voltage, at present due to communication time delay hysteresis motion It is difficult to passing through the power networks such as low voltage crossing forces experiment, the major reason as the inverter development of limitation collecting and distributing type.
And the photovoltaic inverting system described in the present embodiment, referring to Fig. 3, communication apparatus 103 can be set in the form of communication counter It is placed near housing 100, by communication apparatus 103 and each independent inversion unit 104 high speed communication in short distance, can be quick The active and Reactive Power Dispatch of responsive electricity grid, particularly later stage give full play to its reactive power capability, it is had in large-scale power station The standby ability for substituting SVG.
To sum up, the photovoltaic inverting system described in the present embodiment, concentrates pre- mounted in housing by by independent inversion unit 104 Inside 100, by communication apparatus 103 and each independent high speed communication of inversion unit 104, realize multichannel MPPT controls, concentrate Manage, be uniformly accessed into box type transformer 101 and the simple and convenient many advantages combination of O＆M.
In specific practical application, housing 100 can be integral type platform；The integral type platform includes：
It is provided with many bases of independent inversion unit 104；
Or many bases of independent inversion unit 104 are provided with, and be arranged on many independent inversion units 104 The upper lid of side.
Or, housing 100 is shown in Fig. 3：Parcel many box-type shells of independent inversion unit 104, room or collection Vanning.
When housing 100 is parcel many box inverter shell, the inverters of independent inversion unit 104 shown in Fig. 3 When room or container, it is preferred that the photovoltaic inverting system also includes：The air channel being arranged in housing 100 and smog are sensed Device.
Whole housing 100 and its internal structure, according to installation scenario demand, are not specifically limited, in the application herein Protection domain in.
When housing 100 is integral type platform, its internal inversion unit 104 can select the slightly higher device of degree of protection Part；And work as many box inverter shells of independent inversion unit 104 of parcel shown in the Fig. 3 of housing 100, inverter room or During container, because box inverter shell, inverter room or container have certain degree of protection (such as in itself IP54), therefore, the degree of protection of each independent inversion unit 104 can be IP65 (such as general at present group string data inversions Device), it is also possible to lower, such as IP21 (the boosting unit power cell or pure independent inversion list enough with independent inversion unit Unit).
Therefore, another embodiment of the utility model additionally provides another photovoltaic inverting system, independent inversion in Fig. 2 Unit 104 can be：DC/AC converters, or, at least one inversion unit also includes in many inversion units 104：DC/DC Converter；The output end of the DC/DC converters is connected with the input of the DC/AC converters.
Again or, independent inversion unit 104 is：Group string inverter.
Independent inversion unit of the multiple with MPPT functions is put together at (container or other) together, forms multichannel MPPT is controlled.
In addition, referring to Fig. 2, communication apparatus 103 includes：Cell controller 301 and interchanger 302；
The control end of one end of cell controller 301 inversion unit 104 independent with many is connected；
The other end of cell controller 301 is connected with one end of interchanger 302；
The other end of interchanger 302 is the communication terminal of the photovoltaic inverting system.
Cell controller 301 is responsible for each independent inversion unit 104 in housing 100, independent inversion with each The high speed communication of unit 104, enables a system to the active and Reactive Power Dispatch of quick response power network.
Form is implemented this gives inversion unit 104 and communication apparatus 103, but is merely one kind and shown Example, is not necessarily limited to this, can be depending on its specific applied environment, in the protection domain of the application.
Another embodiment of the utility model additionally provides another photovoltaic inverting system, on the basis of Fig. 2, preferably , referring to Fig. 4, exchange collector-shoe gear 102 may be contained within housing 100 with communication apparatus 103 so that housing 100 is externally set Have：
Input, used as the DC interface of housing 100, the output end with direct current collector-shoe gear 105 is connected；
Output end, used as the exchange interface of housing 100, the low-pressure side with transformer 101 is connected；
Communication terminal, as the communication interface of housing 100, is connected with power station backstage.
The external interface of housing 100 is few, externally logical after each independent inversion unit 104 internally is carried out into exchange prepackage Exchange interface is crossed, the low-pressure side with transformer 101 is docked, not only total system is simple, can realize that scene quickly accesses；Together When, the inner core equipment of housing 100 is concentrated and placed, convenient unified management O＆M, quick in the case of can accomplishing without professional Change, O＆M is timely.
Preferably, the communication terminal of housing 100 is connected by optical fiber with power station backstage.
Optical fiber connection can ensure the realization of high speed communication, beneficial to the application of the photovoltaic inverting system.
In specific practical application, the layout type of each independent inversion unit 104 inside housing 100 can be with root According to needing to carry out sweetly disposition, such as wall hanging, lie low installation, or can also as needed be laminated installation.Fig. 6 is a kind of housing The layout type of the inversion unit 104 of 100 internal independences, is not specifically limited herein, in the protection domain of the application.
Specific operation principle is same as the previously described embodiments, no longer repeats one by one herein.
Each embodiment is described by the way of progressive in the utility model, and what each embodiment was stressed is and it The difference of his embodiment, between each embodiment identical similar portion mutually referring to.For being filled disclosed in embodiment For putting, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part Illustrate.
The above, is only preferred embodiment of the present utility model, not makees any formal to the utility model Limitation.Although the utility model is disclosed above with preferred embodiment, but it is not limited to the utility model.It is any ripe Those skilled in the art is known, in the case where technical solutions of the utility model ambit is not departed from, all using the side of the disclosure above Method and technology contents make many possible variations and modification to technical solutions of the utility model, or be revised as equivalent variations etc. Effect embodiment.Therefore, every content without departing from technical solutions of the utility model, according to technical spirit of the present utility model to Any simple modification, equivalent variation and modification that upper embodiment is done, still fall within the model of technical solutions of the utility model protection In enclosing.

Claims (10)

1. a kind of photovoltaic inverting system, it is characterised in that including：Transformer, exchange collector-shoe gear, communication apparatus, many independences Inversion unit and multi-channel DC collector-shoe gear；Wherein：
The input of the multi-channel DC collector-shoe gear corresponds with multichannel photovoltaic group string be connected respectively；
Described many independent inversion unit concentrated settings are in housing；
The input of many independent inversion units is corresponded with the output end of the multi-channel DC collector-shoe gear respectively It is connected；
The output end of many independent inversion units is connected with the input for exchanging collector-shoe gear；
The output end of the exchange collector-shoe gear is connected with the low-pressure side of the transformer；
One end of the communication apparatus is the communication terminal of the photovoltaic inverting system, the other end inversion list independent with described many The control end of unit is connected.
2. photovoltaic inverting system according to claim 1, it is characterised in that the housing is：Wrap up many independence The box-type shell of inversion unit, room or container.
3. photovoltaic inverting system according to claim 1, it is characterised in that the housing is integral type platform；Described one Body formula platform includes：
It is provided with the base of many independent inversion units；
Or the base of many independent inversion units is provided with, and it is arranged at described many independent inversion unit tops Upper lid.
4. photovoltaic inverting system according to claim 1, it is characterised in that the communication apparatus includes：Cell controller And interchanger；Wherein：
One end of the cell controller is connected with the control end of many independent inversion units；
The other end of the cell controller is connected with one end of the interchanger；
The other end of the interchanger is the communication terminal of the photovoltaic inverting system.
5. photovoltaic inverting system according to claim 1, it is characterised in that many independent inversion units are： DC/AC converters.
6. photovoltaic inverting system according to claim 5, it is characterised in that in many independent inversion units at least One inversion unit also includes：DC/DC converters；The input of the output end of the DC/DC converters and the DC/AC converters End is connected.
7. photovoltaic inverting system according to claim 1, it is characterised in that many independent inversion units are： Group string inverter.
8. photovoltaic inverting system according to claim 2, it is characterised in that also include：It is arranged at the wind in the housing Road and Smoke Sensor.
9. according to any described photovoltaic inverting system of claim 1 to 8, it is characterised in that the exchange collector-shoe gear and institute Communication apparatus is stated to may be contained within the housing.
10. according to any described photovoltaic inverting system of claim 1 to 8, it is characterised in that the photovoltaic inverting system it is logical News end is connected by optical fiber with power station backstage.
CN201621186509.0U 2016-11-04 2016-11-04 A kind of photovoltaic inverting system Active CN206250778U (en)

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CA2965113A CA2965113A1 (en) 2016-11-04 2017-04-26 Photovoltaic inverter system
US15/499,080 US20180131193A1 (en) 2016-11-04 2017-04-27 Photovoltaic inverter system
EP17168658.7A EP3319195A1 (en) 2016-11-04 2017-04-28 Photovoltaic inverter system

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